Dental Lace · Dental Floss
Refillable Silk Dental Floss
Lower concern; silk floss with credible PFAS-free positioning and third-party certification.
Dental Lace markets this refillable silk floss as PFAS-free and holds MADE SAFE certification, which tests for PFAS "forever chemicals". Silk is a natural protein fiber unlikely to contain Teflon-family coating coatings.
Brand says: “PFAS-free; natural silk floss marketed as sustainable and non-toxic”
Material
Silk floss with compostable refillable packaging
Brand disclosure
Brand claims PFAS-free
Lab data
No public lab test
Why this grade
Category baseline
cosmetics is a category where PFAS exposure is more common.
Third-party PFAS-free verification
Independently verified PFAS-free by a third party.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Dental Lace floss is made from mulberry silk, a protein fiber that is biodegradable and does not require synthetic polymer coatings typical of conventional nylon or polytetrafluoroethylene (Teflon-type coating) floss. Silk is inert in the oral environment and does not shed microplastics or leach synthetic additives during normal use. The silk is typically waxed with plant-based wax (often beeswax or candelilla) to reduce fraying and improve glide, which poses no identified toxicological risk when used as dental floss. This material profile avoids the chemical dependencies of conventional synthetic floss.
The brand's record and disclosure
Dental Lace is an established ethical-positioning brand in the refillable floss category, known for transparency about ingredient sourcing and sustainability claims. The brand explicitly markets PFAS-free positioning and has pursued third-party certification of this claim, which is rare in the dental floss category and aligns with available product documentation. No established product safety recalls, toxicity complaints, or undisclosed ingredient controversies have been published by health agencies or independent monitoring organizations for this product line. The brand's use of compostable/recyclable packaging further differentiates it from conventional single-use plastic floss containers.
How it compares in its category
Most conventional dental floss (nylon or Teflon-type coating-based) relies on synthetic coatings and petroleum-derived polymers; silk floss eliminates this chemical load and is fully compostable. Silk floss typically performs comparably to nylon in plaque removal when waxed and glides similarly, though individual preference varies. The refillable model reduces plastic waste dramatically compared to disposable floss dispensers. Dental Lace's explicit PFAS-free certification distinguishes it from competitors who do not test or disclose PFAS exposure from floss wax or packaging, a growing concern as PFAS detection in personal-care products increases.
If you buy it
Silk floss performs best when stored in a dry environment; do not expose the refill container to high humidity, which can promote mold growth on the silk or packaging. Use approximately 18 inches per session and discard used floss (it is compostable, so home composting is appropriate if available). Replace the refill when fraying increases or glide diminishes, typically after 2-4 weeks depending on daily use frequency. The packaging is designed for recycling or composting; verify local composting guidelines before disposal to maximize environmental benefit.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Formaldehyde resins in wax coating
Plant-based wax coatings (beeswax, candelilla) used on silk floss do not typically require formaldehyde-releasing preservatives. No published toxicity data or product recalls exist for Dental Lace floss related to formaldehyde exposure.
Microbial contamination in refillable container
Refillable floss containers may accumulate moisture or bacterial biofilm if not stored in a dry environment or if the container lid is not sealed tightly between uses. The silk material itself is resistant to microbial colonization, but the packaging environment requires user diligence.
Pesticide residues in silk or wax
Dental Lace does not publicly disclose pesticide testing on silk or wax inputs. Conventional mulberry silk farming may use pesticides, but no specific contamination has been identified in available product safety documentation or independent testing.
Allergic reaction to silk protein or plant wax
Silk protein allergies are rare but documented; individuals with known silk sensitivity should avoid this product. Beeswax or candelilla wax may trigger contact dermatitis in sensitive users, though risk is low given brief intraoral contact and small surface area.
Choking or swallowing hazard
No specific hazard data exists for this product. Silk floss fragments, if swallowed, are biodegradable and pose lower obstruction risk than nylon; however, standard floss safety warnings apply (keep away from children, do not swallow).
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
Formulations and coatings change between production runs. Always check the current label before buying.
More dental floss grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.